1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
26 #include "call-cmds.h"
27 #include "cli/cli-cmds.h"
28 #include "cli/cli-script.h"
29 #include "cli/cli-setshow.h"
30 #include "cli/cli-decode.h"
33 #include "exceptions.h"
36 #include "breakpoint.h"
38 #include "expression.h"
41 #include "terminal.h" /* For job_control. */
43 #include "completer.h"
48 #include "gdb_assert.h"
51 /* readline include files */
52 #include "readline/readline.h"
53 #include "readline/history.h"
55 /* readline defines this. */
58 #include <sys/types.h>
60 #include "event-top.h"
61 #include "gdb_string.h"
67 /* Default command line prompt. This is overriden in some configs. */
69 #ifndef DEFAULT_PROMPT
70 #define DEFAULT_PROMPT "(gdb) "
73 /* Initialization file name for gdb. This is overridden in some configs. */
77 # define PATH_MAX FILENAME_MAX
83 #ifndef GDBINIT_FILENAME
84 #define GDBINIT_FILENAME ".gdbinit"
86 char gdbinit
[PATH_MAX
+ 1] = GDBINIT_FILENAME
;
88 int inhibit_gdbinit
= 0;
90 /* If nonzero, and GDB has been configured to be able to use windows,
91 attempt to open them upon startup. */
95 extern char lang_frame_mismatch_warn
[]; /* language.c */
97 /* Flag for whether we want all the "from_tty" gubbish printed. */
99 int caution
= 1; /* Default is yes, sigh. */
101 show_caution (struct ui_file
*file
, int from_tty
,
102 struct cmd_list_element
*c
, const char *value
)
104 fprintf_filtered (file
, _("\
105 Whether to confirm potentially dangerous operations is %s.\n"),
109 /* stdio stream that command input is being read from. Set to stdin normally.
110 Set by source_command to the file we are sourcing. Set to NULL if we are
111 executing a user-defined command or interacting via a GUI. */
115 /* Current working directory. */
117 char *current_directory
;
119 /* The directory name is actually stored here (usually). */
120 char gdb_dirbuf
[1024];
122 /* Function to call before reading a command, if nonzero.
123 The function receives two args: an input stream,
124 and a prompt string. */
126 void (*window_hook
) (FILE *, char *);
131 /* gdb prints this when reading a command interactively */
132 static char *gdb_prompt_string
; /* the global prompt string */
134 /* Buffer used for reading command lines, and the size
135 allocated for it so far. */
140 /* Nonzero if the current command is modified by "server ". This
141 affects things like recording into the command history, commands
142 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
143 whatever) can issue its own commands and also send along commands
144 from the user, and have the user not notice that the user interface
145 is issuing commands too. */
148 /* Baud rate specified for talking to serial target systems. Default
149 is left as -1, so targets can choose their own defaults. */
150 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
151 or (unsigned int)-1. This is a Bad User Interface. */
155 /* Timeout limit for response from target. */
157 /* The default value has been changed many times over the years. It
158 was originally 5 seconds. But that was thought to be a long time
159 to sit and wait, so it was changed to 2 seconds. That was thought
160 to be plenty unless the connection was going through some terminal
161 server or multiplexer or other form of hairy serial connection.
163 In mid-1996, remote_timeout was moved from remote.c to top.c and
164 it began being used in other remote-* targets. It appears that the
165 default was changed to 20 seconds at that time, perhaps because the
166 Renesas E7000 ICE didn't always respond in a timely manner.
168 But if 5 seconds is a long time to sit and wait for retransmissions,
169 20 seconds is far worse. This demonstrates the difficulty of using
170 a single variable for all protocol timeouts.
172 As remote.c is used much more than remote-e7000.c, it was changed
173 back to 2 seconds in 1999. */
175 int remote_timeout
= 2;
177 /* Non-zero tells remote* modules to output debugging info. */
179 int remote_debug
= 0;
181 /* Non-zero means the target is running. Note: this is different from
182 saying that there is an active target and we are stopped at a
183 breakpoint, for instance. This is a real indicator whether the
184 target is off and running, which gdb is doing something else. */
185 int target_executing
= 0;
187 /* Level of control structure. */
188 static int control_level
;
190 /* Sbrk location on entry to main. Used for statistics only. */
195 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
199 #define STOP_SIGNAL SIGTSTP
200 static void stop_sig (int);
204 /* Hooks for alternate command interfaces. */
206 /* Called after most modules have been initialized, but before taking users
209 If the UI fails to initialize and it wants GDB to continue
210 using the default UI, then it should clear this hook before returning. */
212 void (*deprecated_init_ui_hook
) (char *argv0
);
214 /* This hook is called from within gdb's many mini-event loops which could
215 steal control from a real user interface's event loop. It returns
216 non-zero if the user is requesting a detach, zero otherwise. */
218 int (*deprecated_ui_loop_hook
) (int);
220 /* Called instead of command_loop at top level. Can be invoked via
221 throw_exception(). */
223 void (*deprecated_command_loop_hook
) (void);
226 /* Called from print_frame_info to list the line we stopped in. */
228 void (*deprecated_print_frame_info_listing_hook
) (struct symtab
* s
, int line
,
229 int stopline
, int noerror
);
230 /* Replaces most of query. */
232 int (*deprecated_query_hook
) (const char *, va_list);
234 /* Replaces most of warning. */
236 void (*deprecated_warning_hook
) (const char *, va_list);
238 /* These three functions support getting lines of text from the user.
239 They are used in sequence. First deprecated_readline_begin_hook is
240 called with a text string that might be (for example) a message for
241 the user to type in a sequence of commands to be executed at a
242 breakpoint. If this function calls back to a GUI, it might take
243 this opportunity to pop up a text interaction window with this
244 message. Next, deprecated_readline_hook is called with a prompt
245 that is emitted prior to collecting the user input. It can be
246 called multiple times. Finally, deprecated_readline_end_hook is
247 called to notify the GUI that we are done with the interaction
248 window and it can close it. */
250 void (*deprecated_readline_begin_hook
) (char *, ...);
251 char *(*deprecated_readline_hook
) (char *);
252 void (*deprecated_readline_end_hook
) (void);
254 /* Called as appropriate to notify the interface of the specified breakpoint
257 void (*deprecated_create_breakpoint_hook
) (struct breakpoint
* bpt
);
258 void (*deprecated_delete_breakpoint_hook
) (struct breakpoint
* bpt
);
259 void (*deprecated_modify_breakpoint_hook
) (struct breakpoint
* bpt
);
261 /* Called as appropriate to notify the interface that we have attached
262 to or detached from an already running process. */
264 void (*deprecated_attach_hook
) (void);
265 void (*deprecated_detach_hook
) (void);
267 /* Called during long calculations to allow GUI to repair window damage, and to
268 check for stop buttons, etc... */
270 void (*deprecated_interactive_hook
) (void);
272 /* Called when the registers have changed, as a hint to a GUI
273 to minimize window update. */
275 void (*deprecated_registers_changed_hook
) (void);
277 /* Tell the GUI someone changed the register REGNO. -1 means
278 that the caller does not know which register changed or
279 that several registers have changed (see value_assign). */
280 void (*deprecated_register_changed_hook
) (int regno
);
282 /* Tell the GUI someone changed LEN bytes of memory at ADDR */
283 void (*deprecated_memory_changed_hook
) (CORE_ADDR addr
, int len
);
285 /* Called when going to wait for the target. Usually allows the GUI to run
286 while waiting for target events. */
288 ptid_t (*deprecated_target_wait_hook
) (ptid_t ptid
,
289 struct target_waitstatus
* status
);
291 /* Used by UI as a wrapper around command execution. May do various things
292 like enabling/disabling buttons, etc... */
294 void (*deprecated_call_command_hook
) (struct cmd_list_element
* c
, char *cmd
,
297 /* Called after a `set' command has finished. Is only run if the
298 `set' command succeeded. */
300 void (*deprecated_set_hook
) (struct cmd_list_element
* c
);
302 /* Called when the current thread changes. Argument is thread id. */
304 void (*deprecated_context_hook
) (int id
);
306 /* Takes control from error (). Typically used to prevent longjmps out of the
307 middle of the GUI. Usually used in conjunction with a catch routine. */
309 void (*deprecated_error_hook
) (void);
311 /* Handler for SIGHUP. */
314 /* NOTE 1999-04-29: This function will be static again, once we modify
315 gdb to use the event loop as the default command loop and we merge
316 event-top.c into this file, top.c */
320 caution
= 0; /* Throw caution to the wind -- we're exiting.
321 This prevents asking the user dumb questions. */
322 quit_command ((char *) 0, 0);
325 #endif /* defined SIGHUP */
327 /* Line number we are currently in in a file which is being sourced. */
328 /* NOTE 1999-04-29: This variable will be static again, once we modify
329 gdb to use the event loop as the default command loop and we merge
330 event-top.c into this file, top.c */
331 /* static */ int source_line_number
;
333 /* Name of the file we are sourcing. */
334 /* NOTE 1999-04-29: This variable will be static again, once we modify
335 gdb to use the event loop as the default command loop and we merge
336 event-top.c into this file, top.c */
337 /* static */ char *source_file_name
;
339 /* Clean up on error during a "source" command (or execution of a
340 user-defined command). */
343 do_restore_instream_cleanup (void *stream
)
345 /* Restore the previous input stream. */
349 /* Read commands from STREAM. */
351 read_command_file (FILE *stream
)
353 struct cleanup
*cleanups
;
355 cleanups
= make_cleanup (do_restore_instream_cleanup
, instream
);
358 do_cleanups (cleanups
);
361 void (*pre_init_ui_hook
) (void);
365 do_chdir_cleanup (void *old_dir
)
372 /* Execute the line P as a command.
373 Pass FROM_TTY as second argument to the defining function. */
376 execute_command (char *p
, int from_tty
)
378 struct cmd_list_element
*c
;
380 static int warned
= 0;
385 /* Force cleanup of any alloca areas if using C alloca instead of
389 /* This can happen when command_line_input hits end of file. */
393 serial_log_command (p
);
395 while (*p
== ' ' || *p
== '\t')
402 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
404 /* If the target is running, we allow only a limited set of
406 if (target_can_async_p () && target_executing
)
407 if (strcmp (c
->name
, "help") != 0
408 && strcmp (c
->name
, "pwd") != 0
409 && strcmp (c
->name
, "show") != 0
410 && strcmp (c
->name
, "stop") != 0)
411 error (_("Cannot execute this command while the target is running."));
413 /* Pass null arg rather than an empty one. */
416 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
417 while the is_complete_command(cfunc) test is just plain
418 bogus. They should both be replaced by a test of the form
419 c->strip_trailing_white_space_p. */
420 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
421 can't be replaced with func. This is because it is the
422 cfunc, and not the func, that has the value that the
423 is_complete_command hack is testing for. */
424 /* Clear off trailing whitespace, except for set and complete
427 && c
->type
!= set_cmd
428 && !is_complete_command (c
))
430 p
= arg
+ strlen (arg
) - 1;
431 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
436 /* If this command has been pre-hooked, run the hook first. */
437 execute_cmd_pre_hook (c
);
439 if (c
->flags
& DEPRECATED_WARN_USER
)
440 deprecated_cmd_warning (&line
);
442 if (c
->class == class_user
)
443 execute_user_command (c
, arg
);
444 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
445 do_setshow_command (arg
, from_tty
& caution
, c
);
446 else if (!cmd_func_p (c
))
447 error (_("That is not a command, just a help topic."));
448 else if (deprecated_call_command_hook
)
449 deprecated_call_command_hook (c
, arg
, from_tty
& caution
);
451 cmd_func (c
, arg
, from_tty
& caution
);
453 /* If this command has been post-hooked, run the hook last. */
454 execute_cmd_post_hook (c
);
458 /* Tell the user if the language has changed (except first time). */
459 if (current_language
!= expected_language
)
461 if (language_mode
== language_mode_auto
)
463 language_info (1); /* Print what changed. */
468 /* Warn the user if the working language does not match the
469 language of the current frame. Only warn the user if we are
470 actually running the program, i.e. there is a stack. */
471 /* FIXME: This should be cacheing the frame and only running when
472 the frame changes. */
474 if (target_has_stack
)
476 flang
= get_frame_language ();
478 && flang
!= language_unknown
479 && flang
!= current_language
->la_language
)
481 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
487 /* Read commands from `instream' and execute them
488 until end of file or error reading instream. */
493 struct cleanup
*old_chain
;
495 int stdin_is_tty
= ISATTY (stdin
);
496 long time_at_cmd_start
;
498 long space_at_cmd_start
= 0;
500 extern int display_time
;
501 extern int display_space
;
503 while (instream
&& !feof (instream
))
505 if (window_hook
&& instream
== stdin
)
506 (*window_hook
) (instream
, get_prompt ());
509 if (instream
== stdin
&& stdin_is_tty
)
510 reinitialize_more_filter ();
511 old_chain
= make_cleanup (null_cleanup
, 0);
513 /* Get a command-line. This calls the readline package. */
514 command
= command_line_input (instream
== stdin
?
515 get_prompt () : (char *) NULL
,
516 instream
== stdin
, "prompt");
520 time_at_cmd_start
= get_run_time ();
525 char *lim
= (char *) sbrk (0);
526 space_at_cmd_start
= lim
- lim_at_start
;
530 execute_command (command
, instream
== stdin
);
531 /* Do any commands attached to breakpoint we stopped at. */
532 bpstat_do_actions (&stop_bpstat
);
533 do_cleanups (old_chain
);
537 long cmd_time
= get_run_time () - time_at_cmd_start
;
539 printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
540 cmd_time
/ 1000000, cmd_time
% 1000000);
546 char *lim
= (char *) sbrk (0);
547 long space_now
= lim
- lim_at_start
;
548 long space_diff
= space_now
- space_at_cmd_start
;
550 printf_unfiltered (_("Space used: %ld (%c%ld for this command)\n"),
552 (space_diff
>= 0 ? '+' : '-'),
559 /* Read commands from `instream' and execute them until end of file or
560 error reading instream. This command loop doesnt care about any
561 such things as displaying time and space usage. If the user asks
562 for those, they won't work. */
564 simplified_command_loop (char *(*read_input_func
) (char *),
565 void (*execute_command_func
) (char *, int))
567 struct cleanup
*old_chain
;
569 int stdin_is_tty
= ISATTY (stdin
);
571 while (instream
&& !feof (instream
))
574 if (instream
== stdin
&& stdin_is_tty
)
575 reinitialize_more_filter ();
576 old_chain
= make_cleanup (null_cleanup
, 0);
578 /* Get a command-line. */
579 command
= (*read_input_func
) (instream
== stdin
?
580 get_prompt () : (char *) NULL
);
585 (*execute_command_func
) (command
, instream
== stdin
);
587 /* Do any commands attached to breakpoint we stopped at. */
588 bpstat_do_actions (&stop_bpstat
);
590 do_cleanups (old_chain
);
594 /* Commands call this if they do not want to be repeated by null lines. */
602 /* If we aren't reading from standard input, we are saving the last
603 thing read from stdin in line and don't want to delete it. Null lines
604 won't repeat here in any case. */
605 if (instream
== stdin
)
609 /* Read a line from the stream "instream" without command line editing.
611 It prints PROMPT_ARG once at the start.
612 Action is compatible with "readline", e.g. space for the result is
613 malloc'd and should be freed by the caller.
615 A NULL return means end of file. */
617 gdb_readline (char *prompt_arg
)
622 int result_size
= 80;
626 /* Don't use a _filtered function here. It causes the assumed
627 character position to be off, since the newline we read from
628 the user is not accounted for. */
629 fputs_unfiltered (prompt_arg
, gdb_stdout
);
630 gdb_flush (gdb_stdout
);
633 result
= (char *) xmalloc (result_size
);
637 /* Read from stdin if we are executing a user defined command.
638 This is the right thing for prompt_for_continue, at least. */
639 c
= fgetc (instream
? instream
: stdin
);
644 /* The last line does not end with a newline. Return it, and
645 if we are called again fgetc will still return EOF and
646 we'll return NULL then. */
654 if (input_index
> 0 && result
[input_index
- 1] == '\r')
659 result
[input_index
++] = c
;
660 while (input_index
>= result_size
)
663 result
= (char *) xrealloc (result
, result_size
);
667 result
[input_index
++] = '\0';
671 /* Variables which control command line editing and history
672 substitution. These variables are given default values at the end
674 static int command_editing_p
;
676 /* NOTE 1999-04-29: This variable will be static again, once we modify
677 gdb to use the event loop as the default command loop and we merge
678 event-top.c into this file, top.c */
680 /* static */ int history_expansion_p
;
682 static int write_history_p
;
684 show_write_history_p (struct ui_file
*file
, int from_tty
,
685 struct cmd_list_element
*c
, const char *value
)
687 fprintf_filtered (file
, _("Saving of the history record on exit is %s.\n"),
691 static int history_size
;
693 show_history_size (struct ui_file
*file
, int from_tty
,
694 struct cmd_list_element
*c
, const char *value
)
696 fprintf_filtered (file
, _("The size of the command history is %s.\n"),
700 static char *history_filename
;
702 show_history_filename (struct ui_file
*file
, int from_tty
,
703 struct cmd_list_element
*c
, const char *value
)
705 fprintf_filtered (file
, _("\
706 The filename in which to record the command history is \"%s\".\n"),
710 /* This is like readline(), but it has some gdb-specific behavior.
711 gdb can use readline in both the synchronous and async modes during
712 a single gdb invocation. At the ordinary top-level prompt we might
713 be using the async readline. That means we can't use
714 rl_pre_input_hook, since it doesn't work properly in async mode.
715 However, for a secondary prompt (" >", such as occurs during a
716 `define'), gdb just calls readline() directly, running it in
717 synchronous mode. So for operate-and-get-next to work in this
718 situation, we have to switch the hooks around. That is what
719 gdb_readline_wrapper is for. */
721 gdb_readline_wrapper (char *prompt
)
723 /* Set the hook that works in this case. */
724 if (after_char_processing_hook
)
726 rl_pre_input_hook
= (Function
*) after_char_processing_hook
;
727 after_char_processing_hook
= NULL
;
730 return readline (prompt
);
738 #if STOP_SIGNAL == SIGTSTP
739 signal (SIGTSTP
, SIG_DFL
);
745 sigprocmask (SIG_SETMASK
, &zero
, 0);
747 #elif HAVE_SIGSETMASK
750 kill (getpid (), SIGTSTP
);
751 signal (SIGTSTP
, stop_sig
);
753 signal (STOP_SIGNAL
, stop_sig
);
755 printf_unfiltered ("%s", get_prompt ());
756 gdb_flush (gdb_stdout
);
758 /* Forget about any previous command -- null line now will do nothing. */
761 #endif /* STOP_SIGNAL */
763 /* Initialize signal handlers. */
765 float_handler (int signo
)
767 /* This message is based on ANSI C, section 4.7. Note that integer
768 divide by zero causes this, so "float" is a misnomer. */
769 signal (SIGFPE
, float_handler
);
770 error (_("Erroneous arithmetic operation."));
774 do_nothing (int signo
)
776 /* Under System V the default disposition of a signal is reinstated after
777 the signal is caught and delivered to an application process. On such
778 systems one must restore the replacement signal handler if one wishes
779 to continue handling the signal in one's program. On BSD systems this
780 is not needed but it is harmless, and it simplifies the code to just do
781 it unconditionally. */
782 signal (signo
, do_nothing
);
785 /* The current saved history number from operate-and-get-next.
786 This is -1 if not valid. */
787 static int operate_saved_history
= -1;
789 /* This is put on the appropriate hook and helps operate-and-get-next
792 gdb_rl_operate_and_get_next_completion (void)
794 int delta
= where_history () - operate_saved_history
;
795 /* The `key' argument to rl_get_previous_history is ignored. */
796 rl_get_previous_history (delta
, 0);
797 operate_saved_history
= -1;
799 /* readline doesn't automatically update the display for us. */
802 after_char_processing_hook
= NULL
;
803 rl_pre_input_hook
= NULL
;
806 /* This is a gdb-local readline command handler. It accepts the
807 current command line (like RET does) and, if this command was taken
808 from the history, arranges for the next command in the history to
809 appear on the command line when the prompt returns.
810 We ignore the arguments. */
812 gdb_rl_operate_and_get_next (int count
, int key
)
816 /* Use the async hook. */
817 after_char_processing_hook
= gdb_rl_operate_and_get_next_completion
;
819 /* Find the current line, and find the next line to use. */
820 where
= where_history();
822 /* FIXME: kettenis/20020817: max_input_history is renamed into
823 history_max_entries in readline-4.2. When we do a new readline
824 import, we should probably change it here too, even though
825 readline maintains backwards compatibility for now by still
826 defining max_input_history. */
827 if ((history_is_stifled () && (history_length
>= max_input_history
)) ||
828 (where
>= history_length
- 1))
829 operate_saved_history
= where
;
831 operate_saved_history
= where
+ 1;
833 return rl_newline (1, key
);
836 /* Read one line from the command input stream `instream'
837 into the local static buffer `linebuffer' (whose current length
839 The buffer is made bigger as necessary.
840 Returns the address of the start of the line.
842 NULL is returned for end of file.
844 *If* the instream == stdin & stdin is a terminal, the line read
845 is copied into the file line saver (global var char *line,
846 length linesize) so that it can be duplicated.
848 This routine either uses fancy command line editing or
849 simple input as the user has requested. */
852 command_line_input (char *prompt_arg
, int repeat
, char *annotation_suffix
)
854 static char *linebuffer
= 0;
855 static unsigned linelength
= 0;
859 char *local_prompt
= prompt_arg
;
863 /* The annotation suffix must be non-NULL. */
864 if (annotation_suffix
== NULL
)
865 annotation_suffix
= "";
867 if (annotation_level
> 1 && instream
== stdin
)
869 local_prompt
= alloca ((prompt_arg
== NULL
? 0 : strlen (prompt_arg
))
870 + strlen (annotation_suffix
) + 40);
871 if (prompt_arg
== NULL
)
872 local_prompt
[0] = '\0';
874 strcpy (local_prompt
, prompt_arg
);
875 strcat (local_prompt
, "\n\032\032");
876 strcat (local_prompt
, annotation_suffix
);
877 strcat (local_prompt
, "\n");
883 linebuffer
= (char *) xmalloc (linelength
);
888 /* Control-C quits instantly if typed while in this loop
889 since it should not wait until the user types a newline. */
893 signal (STOP_SIGNAL
, handle_stop_sig
);
898 /* Make sure that all output has been output. Some machines may let
899 you get away with leaving out some of the gdb_flush, but not all. */
901 gdb_flush (gdb_stdout
);
902 gdb_flush (gdb_stderr
);
904 if (source_file_name
!= NULL
)
905 ++source_line_number
;
907 if (annotation_level
> 1 && instream
== stdin
)
909 puts_unfiltered ("\n\032\032pre-");
910 puts_unfiltered (annotation_suffix
);
911 puts_unfiltered ("\n");
914 /* Don't use fancy stuff if not talking to stdin. */
915 if (deprecated_readline_hook
&& instream
== NULL
)
917 rl
= (*deprecated_readline_hook
) (local_prompt
);
919 else if (command_editing_p
&& instream
== stdin
&& ISATTY (instream
))
921 rl
= gdb_readline_wrapper (local_prompt
);
925 rl
= gdb_readline (local_prompt
);
928 if (annotation_level
> 1 && instream
== stdin
)
930 puts_unfiltered ("\n\032\032post-");
931 puts_unfiltered (annotation_suffix
);
932 puts_unfiltered ("\n");
935 if (!rl
|| rl
== (char *) EOF
)
940 if (strlen (rl
) + 1 + (p
- linebuffer
) > linelength
)
942 linelength
= strlen (rl
) + 1 + (p
- linebuffer
);
943 nline
= (char *) xrealloc (linebuffer
, linelength
);
944 p
+= nline
- linebuffer
;
948 /* Copy line. Don't copy null at end. (Leaves line alone
949 if this was just a newline) */
953 xfree (rl
); /* Allocated in readline. */
955 if (p
== linebuffer
|| *(p
- 1) != '\\')
958 p
--; /* Put on top of '\'. */
959 local_prompt
= (char *) 0;
964 signal (STOP_SIGNAL
, SIG_DFL
);
971 #define SERVER_COMMAND_LENGTH 7
973 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
974 && strncmp (linebuffer
, "server ", SERVER_COMMAND_LENGTH
) == 0;
977 /* Note that we don't set `line'. Between this and the check in
978 dont_repeat, this insures that repeating will still do the
981 return linebuffer
+ SERVER_COMMAND_LENGTH
;
984 /* Do history expansion if that is wished. */
985 if (history_expansion_p
&& instream
== stdin
986 && ISATTY (instream
))
991 *p
= '\0'; /* Insert null now. */
992 expanded
= history_expand (linebuffer
, &history_value
);
995 /* Print the changes. */
996 printf_unfiltered ("%s\n", history_value
);
998 /* If there was an error, call this function again. */
1001 xfree (history_value
);
1002 return command_line_input (prompt_arg
, repeat
, annotation_suffix
);
1004 if (strlen (history_value
) > linelength
)
1006 linelength
= strlen (history_value
) + 1;
1007 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1009 strcpy (linebuffer
, history_value
);
1010 p
= linebuffer
+ strlen (linebuffer
);
1011 xfree (history_value
);
1015 /* If we just got an empty line, and that is supposed
1016 to repeat the previous command, return the value in the
1018 if (repeat
&& p
== linebuffer
)
1020 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++);
1026 /* Add line to history if appropriate. */
1027 if (instream
== stdin
1028 && ISATTY (stdin
) && *linebuffer
)
1029 add_history (linebuffer
);
1031 /* Note: lines consisting solely of comments are added to the command
1032 history. This is useful when you type a command, and then
1033 realize you don't want to execute it quite yet. You can comment
1034 out the command and then later fetch it from the value history
1035 and remove the '#'. The kill ring is probably better, but some
1036 people are in the habit of commenting things out. */
1038 *p1
= '\0'; /* Found a comment. */
1040 /* Save into global buffer if appropriate. */
1043 if (linelength
> linesize
)
1045 line
= xrealloc (line
, linelength
);
1046 linesize
= linelength
;
1048 strcpy (line
, linebuffer
);
1055 /* Print the GDB banner. */
1057 print_gdb_version (struct ui_file
*stream
)
1059 /* From GNU coding standards, first line is meant to be easy for a
1060 program to parse, and is just canonical program name and version
1061 number, which starts after last space. */
1063 fprintf_filtered (stream
, "GNU gdb %s\n", version
);
1065 /* Second line is a copyright notice. */
1067 fprintf_filtered (stream
, "Copyright (C) 2005 Free Software Foundation, Inc.\n");
1069 /* Following the copyright is a brief statement that the program is
1070 free software, that users are free to copy and change it on
1071 certain conditions, that it is covered by the GNU GPL, and that
1072 there is no warranty. */
1074 fprintf_filtered (stream
, "\
1075 GDB is free software, covered by the GNU General Public License, and you are\n\
1076 welcome to change it and/or distribute copies of it under certain conditions.\n\
1077 Type \"show copying\" to see the conditions.\n\
1078 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
1080 /* After the required info we print the configuration information. */
1082 fprintf_filtered (stream
, "This GDB was configured as \"");
1083 if (strcmp (host_name
, target_name
) != 0)
1085 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
1089 fprintf_filtered (stream
, "%s", host_name
);
1091 fprintf_filtered (stream
, "\".");
1094 /* get_prompt: access method for the GDB prompt string. */
1103 set_prompt (char *s
)
1105 /* ??rehrauer: I don't know why this fails, since it looks as though
1106 assignments to prompt are wrapped in calls to savestring...
1110 PROMPT (0) = savestring (s
, strlen (s
));
1114 /* If necessary, make the user confirm that we should quit. Return
1115 non-zero if we should quit, zero if we shouldn't. */
1120 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1124 /* This is something of a hack. But there's no reliable way to
1125 see if a GUI is running. The `use_windows' variable doesn't
1127 if (deprecated_init_ui_hook
)
1128 s
= "A debugging session is active.\nDo you still want to close the debugger?";
1129 else if (attach_flag
)
1130 s
= "The program is running. Quit anyway (and detach it)? ";
1132 s
= "The program is running. Exit anyway? ";
1134 if (!query ("%s", s
))
1141 /* Helper routine for quit_force that requires error handling. */
1150 quit_target (void *arg
)
1152 struct qt_args
*qt
= (struct qt_args
*)arg
;
1154 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
1157 target_detach (qt
->args
, qt
->from_tty
);
1162 /* UDI wants this, to kill the TIP. */
1163 target_close (¤t_target
, 1);
1165 /* Save the history information if it is appropriate to do so. */
1166 if (write_history_p
&& history_filename
)
1167 write_history (history_filename
);
1169 do_final_cleanups (ALL_CLEANUPS
); /* Do any final cleanups before exiting */
1174 /* Quit without asking for confirmation. */
1177 quit_force (char *args
, int from_tty
)
1182 /* An optional expression may be used to cause gdb to terminate with the
1183 value of that expression. */
1186 struct value
*val
= parse_and_eval (args
);
1188 exit_code
= (int) value_as_long (val
);
1190 else if (return_child_result
)
1191 exit_code
= return_child_result_value
;
1194 qt
.from_tty
= from_tty
;
1196 /* We want to handle any quit errors and exit regardless. */
1197 catch_errors (quit_target
, &qt
,
1198 "Quitting: ", RETURN_MASK_ALL
);
1203 /* Returns whether GDB is running on a terminal and whether the user
1204 desires that questions be asked of them on that terminal. */
1207 input_from_terminal_p (void)
1209 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
1213 dont_repeat_command (char *ignored
, int from_tty
)
1215 *line
= 0; /* Can't call dont_repeat here because we're not
1216 necessarily reading from stdin. */
1219 /* Functions to manipulate command line editing control variables. */
1221 /* Number of commands to print in each call to show_commands. */
1222 #define Hist_print 10
1224 show_commands (char *args
, int from_tty
)
1226 /* Index for history commands. Relative to history_base. */
1229 /* Number of the history entry which we are planning to display next.
1230 Relative to history_base. */
1233 /* The first command in the history which doesn't exist (i.e. one more
1234 than the number of the last command). Relative to history_base. */
1237 /* Print out some of the commands from the command history. */
1238 /* First determine the length of the history list. */
1239 hist_len
= history_size
;
1240 for (offset
= 0; offset
< history_size
; offset
++)
1242 if (!history_get (history_base
+ offset
))
1251 if (args
[0] == '+' && args
[1] == '\0')
1252 /* "info editing +" should print from the stored position. */
1255 /* "info editing <exp>" should print around command number <exp>. */
1256 num
= (parse_and_eval_long (args
) - history_base
) - Hist_print
/ 2;
1258 /* "show commands" means print the last Hist_print commands. */
1261 num
= hist_len
- Hist_print
;
1267 /* If there are at least Hist_print commands, we want to display the last
1268 Hist_print rather than, say, the last 6. */
1269 if (hist_len
- num
< Hist_print
)
1271 num
= hist_len
- Hist_print
;
1276 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
1278 printf_filtered ("%5d %s\n", history_base
+ offset
,
1279 (history_get (history_base
+ offset
))->line
);
1282 /* The next command we want to display is the next one that we haven't
1286 /* If the user repeats this command with return, it should do what
1287 "show commands +" does. This is unnecessary if arg is null,
1288 because "show commands +" is not useful after "show commands". */
1289 if (from_tty
&& args
)
1296 /* Called by do_setshow_command. */
1298 set_history_size_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
1300 if (history_size
== INT_MAX
)
1301 unstifle_history ();
1302 else if (history_size
>= 0)
1303 stifle_history (history_size
);
1306 history_size
= INT_MAX
;
1307 error (_("History size must be non-negative"));
1312 set_history (char *args
, int from_tty
)
1314 printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n"));
1315 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
1319 show_history (char *args
, int from_tty
)
1321 cmd_show_list (showhistlist
, from_tty
, "");
1324 int info_verbose
= 0; /* Default verbose msgs off */
1326 /* Called by do_setshow_command. An elaborate joke. */
1328 set_verbose (char *args
, int from_tty
, struct cmd_list_element
*c
)
1330 char *cmdname
= "verbose";
1331 struct cmd_list_element
*showcmd
;
1333 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
1337 c
->doc
= "Set verbose printing of informational messages.";
1338 showcmd
->doc
= "Show verbose printing of informational messages.";
1342 c
->doc
= "Set verbosity.";
1343 showcmd
->doc
= "Show verbosity.";
1347 /* Init the history buffer. Note that we are called after the init file(s)
1348 * have been read so that the user can change the history file via his
1349 * .gdbinit file (for instance). The GDBHISTFILE environment variable
1350 * overrides all of this.
1358 tmpenv
= getenv ("HISTSIZE");
1360 history_size
= atoi (tmpenv
);
1361 else if (!history_size
)
1364 stifle_history (history_size
);
1366 tmpenv
= getenv ("GDBHISTFILE");
1368 history_filename
= savestring (tmpenv
, strlen (tmpenv
));
1369 else if (!history_filename
)
1371 /* We include the current directory so that if the user changes
1372 directories the file written will be the same as the one
1375 /* No leading dots in file names are allowed on MSDOS. */
1376 history_filename
= concat (current_directory
, "/_gdb_history",
1379 history_filename
= concat (current_directory
, "/.gdb_history",
1383 read_history (history_filename
);
1387 show_new_async_prompt (struct ui_file
*file
, int from_tty
,
1388 struct cmd_list_element
*c
, const char *value
)
1390 fprintf_filtered (file
, _("Gdb's prompt is \"%s\".\n"), value
);
1394 show_async_command_editing_p (struct ui_file
*file
, int from_tty
,
1395 struct cmd_list_element
*c
, const char *value
)
1397 fprintf_filtered (file
, _("\
1398 Editing of command lines as they are typed is %s.\n"),
1403 show_annotation_level (struct ui_file
*file
, int from_tty
,
1404 struct cmd_list_element
*c
, const char *value
)
1406 fprintf_filtered (file
, _("Annotation_level is %s.\n"), value
);
1410 show_exec_done_display_p (struct ui_file
*file
, int from_tty
,
1411 struct cmd_list_element
*c
, const char *value
)
1413 fprintf_filtered (file
, _("\
1414 Notification of completion for asynchronous execution commands is %s.\n"),
1420 struct cmd_list_element
*c
;
1422 /* initialize the prompt stack to a simple "(gdb) " prompt or to
1423 whatever the DEFAULT_PROMPT is. */
1424 the_prompts
.top
= 0;
1426 PROMPT (0) = savestring (DEFAULT_PROMPT
, strlen (DEFAULT_PROMPT
));
1428 /* Set things up for annotation_level > 1, if the user ever decides
1430 async_annotation_suffix
= "prompt";
1431 /* Set the variable associated with the setshow prompt command. */
1432 new_async_prompt
= savestring (PROMPT (0), strlen (PROMPT (0)));
1434 /* If gdb was started with --annotate=2, this is equivalent to the
1435 user entering the command 'set annotate 2' at the gdb prompt, so
1436 we need to do extra processing. */
1437 if (annotation_level
> 1)
1438 set_async_annotation_level (NULL
, 0, NULL
);
1440 /* Set the important stuff up for command editing. */
1441 command_editing_p
= 1;
1442 history_expansion_p
= 0;
1443 write_history_p
= 0;
1445 /* Setup important stuff for command line editing. */
1446 rl_completion_entry_function
= readline_line_completion_function
;
1447 rl_completer_word_break_characters
= default_word_break_characters ();
1448 rl_completer_quote_characters
= get_gdb_completer_quote_characters ();
1449 rl_readline_name
= "gdb";
1450 rl_terminal_name
= getenv ("TERM");
1452 /* The name for this defun comes from Bash, where it originated.
1453 15 is Control-o, the same binding this function has in Bash. */
1454 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next
, 15);
1456 add_setshow_string_cmd ("prompt", class_support
,
1457 &new_async_prompt
, _("\
1458 Set gdb's prompt"), _("\
1459 Show gdb's prompt"), NULL
,
1461 show_new_async_prompt
,
1462 &setlist
, &showlist
);
1464 add_com ("dont-repeat", class_support
, dont_repeat_command
, _("\
1465 Don't repeat this command.\n\
1466 Primarily used inside of user-defined commands that should not be repeated when\n\
1469 add_setshow_boolean_cmd ("editing", class_support
,
1470 &async_command_editing_p
, _("\
1471 Set editing of command lines as they are typed."), _("\
1472 Show editing of command lines as they are typed."), _("\
1473 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
1474 Without an argument, command line editing is enabled. To edit, use\n\
1475 EMACS-like or VI-like commands like control-P or ESC."),
1476 set_async_editing_command
,
1477 show_async_command_editing_p
,
1478 &setlist
, &showlist
);
1480 add_setshow_boolean_cmd ("save", no_class
, &write_history_p
, _("\
1481 Set saving of the history record on exit."), _("\
1482 Show saving of the history record on exit."), _("\
1483 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
1484 Without an argument, saving is enabled."),
1486 show_write_history_p
,
1487 &sethistlist
, &showhistlist
);
1489 add_setshow_integer_cmd ("size", no_class
, &history_size
, _("\
1490 Set the size of the command history,"), _("\
1491 Show the size of the command history,"), _("\
1492 ie. the number of previous commands to keep a record of."),
1493 set_history_size_command
,
1495 &sethistlist
, &showhistlist
);
1497 add_setshow_filename_cmd ("filename", no_class
, &history_filename
, _("\
1498 Set the filename in which to record the command history"), _("\
1499 Show the filename in which to record the command history"), _("\
1500 (the list of previous commands of which a record is kept)."),
1502 show_history_filename
,
1503 &sethistlist
, &showhistlist
);
1505 add_setshow_boolean_cmd ("confirm", class_support
, &caution
, _("\
1506 Set whether to confirm potentially dangerous operations."), _("\
1507 Show whether to confirm potentially dangerous operations."), NULL
,
1510 &setlist
, &showlist
);
1512 add_setshow_zinteger_cmd ("annotate", class_obscure
, &annotation_level
, _("\
1513 Set annotation_level."), _("\
1514 Show annotation_level."), _("\
1515 0 == normal; 1 == fullname (for use when running under emacs)\n\
1516 2 == output annotated suitably for use by programs that control GDB."),
1517 set_async_annotation_level
,
1518 show_annotation_level
,
1519 &setlist
, &showlist
);
1521 add_setshow_boolean_cmd ("exec-done-display", class_support
,
1522 &exec_done_display_p
, _("\
1523 Set notification of completion for asynchronous execution commands."), _("\
1524 Show notification of completion for asynchronous execution commands."), _("\
1525 Use \"on\" to enable the notification, and \"off\" to disable it."),
1527 show_exec_done_display_p
,
1528 &setlist
, &showlist
);
1532 gdb_init (char *argv0
)
1534 if (pre_init_ui_hook
)
1535 pre_init_ui_hook ();
1537 /* Run the init function of each source file */
1539 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
1540 current_directory
= gdb_dirbuf
;
1543 /* Make sure we return to the original directory upon exit, come
1544 what may, since the OS doesn't do that for us. */
1545 make_final_cleanup (do_chdir_cleanup
, xstrdup (current_directory
));
1548 init_cmd_lists (); /* This needs to be done first */
1549 initialize_targets (); /* Setup target_terminal macros for utils.c */
1550 initialize_utils (); /* Make errors and warnings possible */
1551 initialize_all_files ();
1552 initialize_current_architecture ();
1554 init_main (); /* But that omits this file! Do it now */
1556 async_init_signals ();
1558 /* We need a default language for parsing expressions, so simple things like
1559 "set width 0" won't fail if no language is explicitly set in a config file
1560 or implicitly set by reading an executable during startup. */
1561 set_language (language_c
);
1562 expected_language
= current_language
; /* don't warn about the change. */
1564 /* Allow another UI to initialize. If the UI fails to initialize,
1565 and it wants GDB to revert to the CLI, it should clear
1566 deprecated_init_ui_hook. */
1567 if (deprecated_init_ui_hook
)
1568 deprecated_init_ui_hook (argv0
);